St Charles Weather Forecast

    • 55
    • 66

    Decreasing Clouds

    • 56
    • 64

    Rain Showers

    • 58
    • 65

    Rain Showers

    • 59
    • 69

    Mostly Cloudy

    • 59
    • 71

    Partly Sunny

    • 59
    • 70

    Chance Thunderstorms

Today 23 Sep Cuming

Mostly cloudy with a 20 percent chance of Showers. Highs in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Sep Cuming

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s. Southeast Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

St Charles Temperature Statistics

September Temperature

Fremont Municipal Airport (26.1 miles)

  • Lowest 10 September, 2026

    55.6 °F

  • Average September

    72.9 °F

  • Highest 2 September, 2026

    94.6 °F

Climate (2021–2026)

Fremont Municipal Airport (26.1 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    64.9 °F
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